Propulsion mechanism.



H. M. CAKE.

PROPULSION MECHANISM.

APPITICATION TILED act. 12, I908. RENEWED MAR. 21, m1.

" 1 ,224, 1 20. Patented Apr. 24, 1917.

gears 3, to the beveled gear 10 and the face plate 7. As the face plate 7 forms a part of the casing member 8 and the tubular; shaft 15,;power transmitted through the face plate is delivered to the lar propeller 16, and similarly as the bevel gear 10 is attached to the stub shaft 11, power transmitted to the beveled gear is delivered to the small propeller 12. Thus it will be'seen that the compensating gears 3 perform a double function namely, first, that of transmitting power from the engine'shaft to the two propellers, and secondly that of forming compensating means whereby a condition of equilibrium is maintained between the two propellers 12 and '16. The large propeller will normally offer a greater resistance to the medium through which it is revolvin than will the small propeller, pre suming 5121i both are revolving at the same rate of speed. Since the compensating gears 3 have a function of being an equalizing pivot, it will be seen that the large propeller will be slowed down in its number of revolutions,and the small propeller will be eorrospondingly increased until the transmittedforce is equal on both sides of the compensating gears 3. This relationship automatically divides the effective propulsion power, equally between the two'pro ellers, irrespective of the size of the propel BIS or the pitch of their blades, -and thus it will be seen that the given power on the engine shaft. will doliver an effective power to the propellers equally distributed between them in such manner that each propeller is operating at its greatest efficiency.

Furthermore, this invention prov'idesthat both propellers be rotated in the some direction. This fact will tend to reduce the churning, which is merely power lost in disturbing, water and not effectua} in propelling the boat, because of the act that both propellers are passing through the water in the same direction. The application ofthis invention applies equally well to propellers used in aero-crafts. I desire it tobe understood that my invention covers any craft that is propelled by means of screw propellers.

As many changes could be made in the above described structure and many widely different embodiments of this invention collld be made without departing from the scope thereof, the definite matter contained in the above description and shown in'the accompanying drawings, is to be taken as illustrative and not'in its limiting sense.

I desire it also to be understood that the language used in the claims is intended tocover all generic and-specific features of this invention herein described, and all statements of the scope of the invention which as a matter of language might fall therebetween.

both the cylindrical shaft on gagement with the compo v tubular shaft,- a" cylidri within said tubular shaft, a; propeller .corried by' said cylindricalshsft, one of said" 'beveled gears being 0 Having described my invention what I claim is 1. In a propulsion mechanism in combination, a driving nhoft, c cylindrical driven shaft a tubular shaft surrounding said cylindrical shaft, compensating moans operatively connectin said drivi shaft with the tubular shaft to. drive the c lindrical shaft and the tubular shaft in t a same direction, and propellers on both driven shafts.

2; In a propulsion mechanism in combination, a driving'shlft, a transmimion head, compeusatug goals carried by said trans mission ban ,a cylindrical driven shaft, a

tubular driven shaft, operative means con necting said tubular shaft with said compensating ars, operat ve means connecting said cylin rical shaft with said-com nsating gears to drive said cylindrical s aft in the same rotative direction as the tubular shaft. and propellers on both driven shafts.

3. In a propulsion mechanism in combination, a driving shaft, two driven shafts axially alined and axially alined with the driving shaft, compensating-means operatively connectingmsoid driving shaft with said driven sha to drive both the said driven shafts in the. slime direction, and screw propellers on both driven shafts.

4. In a propulsion mechanism in combination, a driv n shaft, in transmissionhead carried by said gears upon said transmission head, a 108 plate carrying-thereon a beveled gear in e nrs, 'o tubularshaft, a casing integral with said tubular shaft, said face plate being secured to and comprisi a closure for said a cylindrical sha :within said tubular sha a bevelcdgenr carried upon acid c lindrical shaft and in engagement with t c.0011:- pensating gear-sic propeller on saidltubular shaft, andia shaft.

5. In a propulsion mechanism in o'onibination, a driving shaft, a' transmimion head carried by saiddriving shaft, com ting gears, beveled gears engagingsai compensating gears at diametrically opposite points, a tubular. shaft, a r0 ler. onsoid feel a aft mounted rativcly connected with said tubulnr'sha ,jnn'd the othcrf'of saidbeveled ge'ara'bcin --,op'orativcly con nocted with said cylindncal shaft. V

6. A propulsion mechanism including'a driving shaft, two screw propellers mounted in axial alinement and means intermedb ate said driving shaft-and slid propeller-Ito drive both propcllers-in-the some ditibtion nrsuch manner that the speed of either of. said propellrna is depeddentnpon the reriving shaft, compensating propeller on the cylindrical sistance offered to the other propeller, both of said screw propellers rotating about the axis of the'driving shaft.

7. A propulsion mechanism including a driving shaft, two driven. shafts, screw propcllers on said shafts, said propellers being mounted in tandem and means intermediate said driving shaft and said driven shafts to drive both driven shafts in the same direction and to equalize the effective force delivered by each propeller.

8. A propulsion mechanism including a driving shaft, two driven shafts in axial alinement and in axial alinement with the driving shaft, screw propellers carried by said driven shafts, and compensating gears intermediate said driving shaft and said driven shafts whereby both propeller shafts are driven in the same direction and the force delivered by the driving shaft is automatically and equally divided between the said propellers when 'the mechanism is in a normal operation.

9. A propulsion mechanism i.ncluding a driving shaft, a cylindrical driven shaft, :1

t'ubulardriven shaft surrounding said cylindrical drive-n shaft, propellers carried upon said driven shafts, and means intermediate said driving shaft and said driven shafts whereby the driven shafts are rotated in the same direction ,and,the force delivered by each propeller ii? automatically equalized.

10. A. propulsion. mechanism including a driving shaft,two driven shafts, screw. prbp'ellcrs on said shafts, said propellers being a mounted in tandem and means intermediate to the other propeller.

said driving shaft and said driven shafts to drive both the driven shafts in the same direction and to e ualize the effective force delivered by eac i propeller, the driving shaft and driven shafts being in axial ali-nement. r a 11. A propulsion mechanism including a driving shaft,two screw pro ellers.mounted in tandem, means interme iatesaid driving shaft and said propellers whereby both propellers are rotated in the same dire tion and the speed of either of said propell rs is made dependent upon the resistance ofllered 12. In a propulsion mechanism in combi nation, a driving shaft, two driven shafts, screw propellers carried on said driven shafts and compensating means operatiwely connecting said driving shaft and said driven shafts to drive both driven 'sha ftsin.

the same direction, the blades of said screw propellers being pitched in the same direc- In a propulsion mechanismin combinatiopia driving shaft,'a transmission head gagement with the compensating gears, a tubular shaft, a propeller on said tubular shaft, a casing attached to said tubular shaft, said face plate being secured to and comprising a closure for said casing, :1 cylindrical shaft mounted within said tubular shaft, a propeller carried upon saidcylindrical shaft, and a beveled gear on the. ey lindrical shaft and in engagement with the comp'ensatin gears, the driving shaft, the

- tubular shatand the cylindrical shaft all being in axial alinement.

14. A propulsion mechanism including a compensating gears carried by said transmission beau, a. cylindrical shaft, a tubular driven shaft, operative means connecting said tubular shaft with said compensating gears, operative means'connectingsaid cylindricalshaft with said compensating gears to drive said cylindrical shaftin the same rotative'direction as said tubular shaft is driven, apropeller carried upon said tubular shaft and a propeller carried upon said, cylindrical shaft, the driving shaft, the tubular shaft and the cylindrical driven shaft all being in axial alinemcnt.

16. In a propulsion mechanism in combination, a driving shaft; a cylindrical driven shaft, a tubular shaft surroundingsaid cylindrical. shift, and compensating means operatively connecting said driving shaft with both the; cylindrical shaft and the tubular shaft whereby bdthshafts are driven in the same direction, apropelle'r mounted upon said tubular shaft and a ropeller mounted upon said cylindrical sha. t. i

17.A.pr0pulsion mechanism including a driving shaft, two driven shafts, screw pro-f pellers mounted in tandem on said. driven shafts, compensating gears intermediate said driving shaft an" said driven shafts whereby both driven shafts are rotated in 'thesame direction and the force delivered by the driving shaft is .,automatically and equally divided betweensaid propellers when the mechanism is in normaloperation, 18. In a propulsion mechanism in combi;

nation, a dri ving"shaft,a transmission he'ald H carried bysaid driving shaft', ,comp p ing ears carried on the transmission head, beve ed gears N engaging said compensating gears on diametrically opposite sides, a

tubular shaft, a propeller on said tubular shaft, a cylindrical shaft mounted within saidtubular shaft, a propeller carried on said c lindrical shaft, one of said beveled gears eing operatively connected with said tubular shaft, and the other of said bevele'd gears being operativcly connected with said cylindrical shaft, the driving shaft, the tubular shaft and the driven cylindrical shaft all being axially alined.

19. A propulsion mechanism including two screw propellers mounted in tandem, a'

21. A propulsion mechanism includinga plurality of screw propellers revolving 1n the same direction, all of said propellers being mounted in tandem to rotate about, a common axis of rotation, a driving shaft, and means for causing the effective working load to be automatically distributed equally among said propellers.

22. In a propulsion mechanism in combination, a driving shaft, two concentric driven shafts, screw propellers having blades pitched in the same direction carried by said driven shafts, and means for taking power from each side of said driving shaft and delivering saidpower to each side of said driven shafts.

23. In a propulsion mechanism in combination, a driving shaft, a transmission head,

compensating blades of said screw .propeller'bcing pitched in the same direction, means for taking power from each side of said compensating gears and transmitting said power to said propellers to drive said propellers in the same rotative direction.

2a. A propulsion mechanism including a drivingsliaft, a transm ssion head, compensating "gears carried by said transmission head, a cylindrical driven shaft, a propeller v i on said cylindrical shaft, a' tubular shaft, a

56 shaft and said cylindrical shaft both being propeller on said tubular shaft, said tubular on one side of said transmission head, a bev eled gear operatively connected with said cylindrical. shaft, said beveled gear being on the same side of the transmission head as are the propellers, and a second beveled gear on the opposite sideof tllGSaKl transmission .head and operatively connected with the said tubular shaft.

Q5. In a propulsion mechanism in combination. a driving shaft, a transmission head carried; on said gearsu 'ion said transmission head, a ace plate carrying",a beveled gear, a tubular shaft, a cylindrical shaft mounted within said tubular shaft, a propeller shaft, a beveled gear are driven in the in the same direction and for autogears, screw propellers. bothon one side of said compensating gears, the carried by comprising a closure driving shaft, alined,screw propellers mounted in tandem driving shaft, compensating substantially at inon said tubusaid cylindrical carried upon said cylindrical shaft and a casing operatively connected with said face plate and said tubular shaft and a propeller on lar shaft, said casing inclosing the said compensating gears and the beveled gear on the cylindrical shaft.

26. In a propulsion mechanism in combination, a driving shaft, a. cylindrical driven shaft, a tubular .shaft surrou ding said cylindrical shaft, rotative means operatively connecting said driving shaft with both the cylindrical and the tubular shafts to drive said cylindrical shaft and said tubular shaft in the same direction, pivotal means about which said rotative means rotate, the axis of said pivotal means being at right angles to the axis of said driving shaft, a propeller on said cylindrical shaft, and a propeller on said tubular shaft.

27. In a propulsion mechanism in combi nation, a driving shaft, a transmission head, compensating gears mounted upon said transmission head, a cylindrical driven shaft, a tubular shaft surrounding said cylindrical shaft, the axis about which said compensating gears rotate being ninety de grees to the axis of id driving shaft, operative means connecting said tubular'sliaft with said compensating gears, operative means connecting said cylindrical shaft with said compensatir 2; gears;a propeller mounted upon said tubular shaft, and a propeller mounted upon said cylindrical shaft.

28. In a propulsion mechanism in combination, a driving shaft, atransmission head said driving shaft, compensating gears rotatively mounted upon said transmission head, the axis ab ut which said compensating gears rotate icing at ninety degrees to the axis of said driving shaft, a faceplate carrying thereon a beveled gear engaging the compensating gears, a tubular shaft, a casing integral with said tubular shaft, said face plate being secured to and drical shaft mounted withinv said tubular shaft, a beveled gear carried by said cylindrical shaft and also engaging the compensatinggears, a'propeller on said tubular shaft, and apro'p eller on said cylindrical shaft. f

129, A propulsion mechanism including a two driven. shafts axially onsaid, driven shafts, rotative means inter- .medi'a te saiddriving shaft andsaid driven the effective force delivshafts to equalize ered by each propeller, being adapted to rotate said rotative means of the driven shafts.

30. Afpropulsion driving shaft, two driven shafts axially for said casing, a cylinupon an axis that is ety degreestothe axis mechanism including a wjvhieh are substantially ninety degrees to the axis of said driven shafts, the driving shaft and the driven shafts being in axial alinelnent. 1

HORACE M. CAKE. Witnesses:

E] F. RILEY,

M. B. NI snow. 

